Complete Resection of Mediastinal Undifferentiated Pleomorphic Sarcoma.

A 70-year-old man was referred to our hospital for mediastinal malignant neoplasm. Chest computed tomography revealed a 20-cm mass in the middle mediastinum with displacement of the superior vena cava, left innominate vein, and right upper lobe. Tumor resection, right upper lobectomy, combined resection of the left brachiocephalic vein and superior vena cava, and revascularization were performed. It was pathologically diagnosed as an undifferentiated pleomorphic sarcoma, and the patient experienced no recurrence for 4 years. Although the prognosis of mediastinal pleomorphic sarcoma cases is poor, complete surgical resection may lead to long-term survival.